Stop motion for knitting machines



Aug. 2, 1927.

W. L. SMITH, JR

STOP MOTION FOR KNITTING MACHINES Filed March 22. 1924 Q 1 E L: 3%

WiHiamLSmiihJr Patented Aug. 2, 1927.

-wrnnrlimn SMITH, an, or NASHVILLE;

*mrttsorunsnvnnn, TENNESSEE, Aconroaaairon OF TENNESSEE.

sror Morron son KNITTING MACHINES.

,Amilication filed March 22, 1924. Seria1 No. 7 01,208.

My'said invention relates to a'eneedle stop motion for knitting vmachines (adapted to stop the machine on the breaking of a dial needle or thellatch or, butt 7 of a cylinder needle orwhen, for any reason the yarn becomes piled up on the needles or onvoccurrence of, a'loose yarn. It is an object of myinvention to provide a stop motion of this, characterwhich shall be simple,

cheap and ,efiective and which oanlbe 'ap-- plied to various types of knitting machines now in use though provision for knitting round and round, at

I certain; times'and reciprocating at others,

stockings with rib tops thus knitting e g and plain 2 feet. 3

:Ret'erringto which are a parts,

chine with the device .of my invention in @placeithereon; parts being broken away for clearness, 1 t I Figure 2 a section on line 22 ofFigure '1,

Figure l 1 and Figure 1.}

In the I indicates a support of ordinary type for the knitting machine head, 11 the latch rings support, 12the sinker cam;ring,"13 the latch ring, 14 the dial, and 15 the dial camcap,

all of said parts being of the ordinary type familiar to thoseskilled in the art. On the so that any accumulation of yarnon needles,

of either bank will catch the point of the depending arm, Whether hooked or not, and,

will swing the lever about its pivot 16. The horizontal arm 17 at its free end normally rests in a slot in a vertically extending cylindrical guide 20 and engages an annular notch in a plunger 21, thus holding the plunger down against the action of a spring it is peculiarly adapted fOlfuSG Wlt-ll a rib knitting machine having I J v 'lever in the other direction. I the acconipanymg drawings, 2 made apart hereof and on which 20 similar 1 reference characters indicate sim lar I vsection on line 3,-3 of Figure 2 Figure v 1 is a detail of a lever ,shown'in drawings reference character [10 rnunnssnnyassrenon T0 my Hosmmz 22 tending to raise the same. Midway of its lengththe plunger has a pin 23 projecting through a slot in the guide for manually return ngit against the action ofthe spring into position to beheld by arm 17. At its upper end, the plunger carries a disk 24 held inplace by a screw 25 so as tobe free to rotate on the latter. 2

On a fixed part ofthemachine abovethe dial cap a lever26 is supported on a pivot 27, this lever having a projecting contact finger 28.v The contact device is pivoted on lever 26 by a pin 29 in a manner to permit the device to swing freely relativelyto the lever 26 in one direction while itis held rigidly against movement relatively tothe Should the disk2l be raised during reciprocating knitl a 2 inthe direction ofordinary rotation forknit- Figure 1 1s an elevation of a'knlttingma ting'round and round and will swing the lever 26 about its pivot and through a'series of links and pivoted disks 30. 31.32, .33 and 34- will swing a detent 35 on its pivot 36, in a diordinary manner. If the cams are moving backward, i. e.clockwise or in the reverseof the ordinary direction for knitting, the fin-V ger 28 will swing on its pivot '29 to let the j roller pass and. then will resume; its working. position, so as to trip the stop motion on the return of the roller with the knitting cams.

The point of the bent lever at the endof the vertical arm 19 is preferably located just inside the'circle of cylinder needles and extends down far enough to strike a bent dial needle or v one that is projected when it should be retracted. The latter contingency will occur for instance if a dial needle should have its butt broken off and so remain in projected position. Preferably also the bar 19 will bearranged slightly in rear of the needle wave of the dial needles so as to catch a defective needle or brokenthread or other defeet as soon as possible after its occurrence and thus stop the machine without unnecessary delay. 2 4

It will be obvious to those skilled in the art that certain features of my invention may be modified invarious Ways and therefore I do not limit myself to the specific mechanism plunger for, holding it down, a feeler inteshown in the drawings and describedin the specification but only as indicated in the apvention, what I claim as new and desire'to" secure by Letters Patent, is:

' 1. A stop motion for knitting machines comprising a 'feeler arranged within the circle of cylinder needles traveling within said circle, a vertically movable plunger,

. means tending to movethe plunger upward,

a detent for the plunger operated by said feeler, and means adapted to be actuated by said plunger when releasedior stopping the machine,substantially as setforth.

2-. A stop motion for knitting machines comprising a support within the circle of cylinder needles, a'feeler'pivoted thereon and extending close to the needle circle, an upwardly movable device normally held down by the feeler, alever mounted above said up wardly movable device. and adapted for actuation thereby when released, and connections from said lever for stopping the machine, substantially as set fortln 3; A stop motion for dial and cylinder knit-ting machines comprising a plunger on the dial cam cap, a detent for holding said plunger in one position, .a feeler within the needle circle and adjacent the plane of the dial needles adapted to release said detent and means adapted to be actuated by the plunger when released for stopping the machine, substantially as set fortl p V 4. A stop motion for dial and cylinder knitting machines comprising a plunger supported for vertical movement on the dial cam cap, a spring for moving it upward, a horizontally movable detent engaging said gral with the detentand located adjacent the intersection of the dial and cylinder needles and means on a stationary part of the machine adapted to be engaged by said plunger when released for stopping the machine, sub

stantially as set fort on a fixed part of the machine adapted to be moved by the released plunger in one direction of rotation to stop the machine and a finger on said lever adapted tobe moved independently thereof on a reverse rotation of the machine, substantially as set forth.

6. A stop motion for dial andcylinder knitting machines comprising a bearing on the dial cam cap, a plunger vertically movable in the bearing, a spring to force the plunger upward, a detent for the plunger having a point adjacent the verge of the forming fabric, and means, operable by the plunger when raised for stopping. the machine, substantially as set forth.

7. In a knitting machine, a stationary needle cylinder, a stationary dial, arotary dial cam cap, and alatch-ring, in combination with a feeler supported within the needle circle adjacent/the verge of the forming fabric, tripping means within the needle cirQ cle' controlled by said feeler, and connections to a stop motionof conventional type including an element on a fixed partof the machine vin the path of said tripping means when the tripping means is released by said feeler, substantially as set forth.

In witness whereof, I have hereunto setmyhand at Nashville, Tennessee this 13th day of March, A.-D.nineteen hundred and tweiitydour.

- WILLIAM L. SMITH, JR. 

